Adding USB port / sub to a car with iDrive?
Hi there im new to this forum, i have just bought a e90 320D which came with idrive and bmw navigation business cd unit
the car has an aux output in the arm rest however there is no USB output which is what im used to using.
I really need to find a way to add a USB port for music. what are my options? also next would be to hook up a sub if there are any guides available?
Any help appreciated